JPS5920940A - Wire circuit protecting switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of drawing an arc during a breaking operation between a fixed contact piece and a movable contact piece, and moving the arc extinguishing plate array from the arc guiding plate sandwiched between the arc extinguishing plate array. The present invention relates to a magnetic line protection switch having an arc-extinguishing base that guides an arc to a fixed contact piece, and a self-bottomed arc guide plate having a slit lc running in the direction of arc travel.

A power line protection switch in which a guide plate attached to a fixed contact piece has a slit is disclosed in West German Patent Publication No. 3034149.
It is known by the number.

The object of the invention is to provide a line protection switch of the type mentioned at the outset, in which the arc movement is further improved.

This object is achieved in accordance with the one-line protection switch of the present invention in that the arc conductor plate attached to the movable contact piece also has a slit running in the direction of arc travel.

= If a slit is provided in the arc board to which the arc extinguishing board belongs, the interlocking of the arc to the arc board row will be slightly improved.

The effect is based on the experience that the origin of the arc on a thin polarization moves more rapidly. There is a Todoro rA temporary in the arc extinguishing chamber, and the arc base point is above it.
(X-shape) Moves with its sides blocked by side walls made of plastic, ceramic, etc. Due to the cooling effect of this side wall, which is 1' to 7-vertical, the plasma and arc origin are usually centered. When the arc guide plate occupies the entire width of the arc extinguishing chamber, the arc guide plate feeds four arcs per inch into the arc base point and is performed in a wide fan shape 7i 71. Therefore, the magnetic blowing effect on the arc base point is relatively small, and the M flow path opposite to the traveling direction of the arc flows into the arc base point, and in addition to the magnetic blowing effect of this part, a braking effect is exerted on the arc moving speed. It often happens that the arc origin breaks off laterally, so that the movement of the arc is no longer continuous and the speed of movement of the arc is disadvantageously reduced. In particular, by providing a slit in the steel plate of the yoke or in the arc guide plate belonging to the movable contact piece, the magnetic blow-off effect on the base point is greatly increased, especially at the location of the slit. Since the base point of Oborozuki's arc must be transferred through the free gap to the 10,000 yen of the Jinkkyo of this i "+" in the possible tr++, upper 6L is especially important. The 4JWL flow path portion, which is guided from the edge and flows into the arc base point in the opposite direction to the arc running direction, is also reduced to a large size.

In a particularly preferred embodiment of the present invention, an exhaust chamber is provided behind at least a slit cross-section arc plate belonging to the fixed contact piece, and the exhaust chamber is preferably a crawlway protection switch box in contact with an arc plate belonging to the fixed contact piece. It consists of a recessed part recessed in the wall.

In this way, behind the arc guide plate with slits, in particular behind the arc guide plate belonging to the fixed contact piece, if the exhaust chamber leading to the exhaust passage is transformed by the feature of claim 3, an arc is created. The pressure inside the arc extinguishing chamber generated by The arc travel speed is thereby increased.

Further preferred embodiments are evident from claim 4.

In short, the device according to the invention increases the arc travel speed and stabilizes the current by 7J, thereby significantly limiting the current.
F6 road protection switch (in which the minimum arc pressure required for effective Q-current limitation is reached more rapidly and therefore the short-circuit laminar flow is made stronger for better protection of lines and equipment) It can be said that it is possible to limit the present invention based on the drawings showing the non-inventive embodiment.
! - Explain and describe yourself in detail.

The magnetic line protection switch is housed in a plastic case 10 and has an arc extinguishing chamber 12'ff. Fixed contact piece 14 and OK! vI connection (Renoku-16
In some cases, movable contacts and contact pieces with 18 forces are installed. The fixed contact piece 14 has an arc plate 20 force Xi! It'; IN.

The seventh end tiii&s extending outwardly from the cake bears the connecting terminal 22.

In addition, 262 yoke lines were installed for the leisure line maintenance switch. The diagrammatically illustrated magnet system 24'ff has: The above-mentioned yoke 26 is provided in the lower area of the drawing in the shadow t3-f f'+b30, and allows the contact piece 18 to be fitted with a cross-section plate of 3-2. Main arc plate 2θ and 28 A I/1 Dani Y Port f
There is f1L board row 32! (The arc car 711 is filled with earth, and the arc is extinguished there.The arc extinguishing chamber 12km goes to the rear, that is, to the left in the drawing, and goes into the exhaust passage 34.

The arc-extinguishing plate row 32 is sandwiched between the two arc conductor plates 28 and 20 and the hash slit 36 and the 313'i tool 1nfi.
Since the slit 36 is an area of the fixed contact piece, it extends from the arc extinguishing plate row in the arc running direction.

On the wall of the case 10 that is in contact with the arc guide plate 20.

1υ] i;'B section 40 is provided. Concave portion 4o
virtually spans the entire length of the arc extinguishing chamber and reaches the exhaust passage 34.
.

Ru. In general, this recess 40 acts like an exhaust passage, reducing the pressure generated within the arc chamber.

Travel 1': Discharges a gas cushion which is located in front of the arc and acts as a brake on the arc moving speed as an S reverse force, contributing to an increase in the arc traveling speed.

Two slits 38, 36 and an exhaust passage 4° are created,
achieved.

The gas flow occurring in the exhaust channel 40 runs in the direction of the arrow P.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arc extinguishing chamber area of the storage line protection switch with a part of the side wall cut away, and FIG. 2 is a plan view taken along line 1--n in FIG. 1. 18--Movable contact piece, 28--Arc guide plate, 38--Slit.

Claims (1)

[Scope of Claims] l) An extinguisher that draws in an arc during a breaking operation between a fixed contact piece and a movable contact piece, and guides the arc from an arc guide plate sandwiched between an arc extinguishing plate array t to the arc extinguishing plate array. It has an arc chamber, and the arc guide plate assigned to the fixed contact piece has a slit tf running in the direction of arc travel. An electric line protection switch characterized in that the arc guide plate (f28) assigned to the movable contact piece (I8) also has a slit (3B) fc running in the arc running direction. 2F An exhaust chamber f4 is provided at least behind the slit arc guide plate (2o) assigned to the fixed contact piece (14),
The exhaust chamber is preferably disposed behind the row of arc extinguishing plates on the wall of the wire protection switch box in contact with the arc conducting plates belonging to the fixed contact piece, and is used to discharge the arc extinguishing gas into the environment. Has an exhaust path. Is the exhaust chamber (40) aligned with the exhaust path (34)?
The forming line protection switch according to claim 2, which is characterized by The inkstone line protection switch according to any one of claims 1 to 3, characterized in that a slit running in the arc travel direction is provided.